Radio contact pin



Feb. 19, 1935. 'w. H. VON SCHEVEN 1,991,914

RADIO CONTACT PIN Filed Aug. 12, 1933 WWW/W WWW f" gmenor I Patented Feb. 19, 1935 UNITED STATES PATENT OFFICE name oon'rac'r rm Waldemar H. von Scheven, Waterbury, Conn. Application August 12, 1933, Serial No. 684,921 1 Claim. (01.173-361) This invention relates to certain new and useofthe base member of a lamp or the like, but it has been found in pins of such a structure that the same have a tendency to bend in the vicinity of the annular bead during attachment of the pin to the base member resulting in having the opposite end section out of alignment.

It is therefore a further object of this invention to produce a radio contactpin which remains in true alignment throughout its length during the mounting thereof in the base member and also in service, the pin being formed of sheet metal and rolled into tubular form with a pair of diametrically opposite ears struck out therefrom in lieu of the usual annular bead, this arrangement effecting a saving of material in the manufacture of the pin and also providing for intimate contact between the pin and base member to prevent turning of the pin during the heading or riveting. operation. e

With the above and other objects in view that will become apparent as the nature of the inven-- tion is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawing:-

40, Figure 1 is a developed plan view of the blank from which the radio contact pin is made;

Figure 2 is a plan' view similar to Figure 1,

showing ears struck out from intermediate portions of the blank adjacent one end thereof;

45 Figure 3 is a side elevatlonal view of the blank partly folded into tubular formation showing the diametrically opposite struck out ears;

Figure 4 is aside elevational view of the blank completely rolled into tubular formation;

Figure 5- is a top plan view of the partially folded blank shown in Figure 3;

Figure 8 is a top plan view of the completely folded blank shown in Figure 4; V

Figure 7 is another side elevational view of the 3 completely formed contact pin;

Figure 8 is a side elevational view of the contact pin anchored to a base member that is fragmentarily illustrated in section;

Figure 9 is a top plan view of the contact pin as shown in Figure 7; and

Figure 10 is a top plan view of the contact pin as shown in Figure 8 detached from the base member.

As shown in Figures 1 and 2, the radio contact pin is formed from a sheet metal blank 15 of rectangular form indeveloped plan view as illustrated and has parallel side edges 16 and toothed or serrated end edges 17 and 18 respectively. The blank 15 as shown in Figure 1 is provided with a pair of U-shaped slits 19 at one side of the transverse median line of the blank adjacent the serrated end 17 with the curved sides of the slits directed toward said end 17 and the material of the blank bounded by said slits 19 is struck out to provide a pair of transversely aligned spaced ears 20 as shown in Figure 2.

In folding or rolling the blank 15 into cylindrical formation to produce the contact pin, the same is first rolled into U-shape as shown in Figures 3 and 5 with the ears 20 diametrically opposite each other. The side edges 16 of the blank 15 are then folded or rolled inwardly as shown at 16a in Figures 4 and 6 to produce the cylindrical contact pin 15a, the ears 20 remaining diametrically positioned with respect to the cylindrical pin 15a. The serrated ends 17 and 18 of the pin are then rolled inwardly as at 17a and 18a respectively to provide restricted openings for the passage of conductor wires.

In mounting the contact pin in a lamp base, radio tube or the like, the base member 21 of the tube 22 is first provided with a cylindrical opening 23 through which the end portion 17 of the pin is inserted from the outer side of the base member, the pin end being moved through the opening 23 until the diametrically opposite ears 20 move into frictional engagement with the outer face of the base member 21. The serrated end 17 of the pin is then head over or riveted as at 17b for cooperation with the ears 20 in forming locking means for retaining the contact pin rigidly connected with the base member 21 of the lamp device; The headed or riveted end of ,the contact pin is clearly illustrated in Figures of the struck out cars 20 in lieu of the usual annular bead, the ears 20 acting to lock the pin to the base member against rotary movement intheopening23duringtheheadingorriveting andanassociatedrizid tubularcontactpimeaid operation on the end 17 of the pin. pin being formed from sheet metal and havinle From the above detailed description of the indiametrically opposite ears struck-out therefrom 'vention, it is belived that the construction and adjacent one end for engagement with the outer there is herein shown and described the pr struck-out ears being located within the hue terred embodiment of the invention, it is neveropening through, which th pin extend; and midv theless to be understood that minor changes may end 1 th i b ing errated to provide more be made therein without departing from the lpirt outwardly at right angles to cooperate o it 2nd scope of the invention as claimed. t th mg for securing the pin in the hue. 10

claim: 7 An electric fitting having an insulating base WALDEHARB. vol BCHIVIN.

5 use thereof will at once be apparent and while face of the base, the openings formed by the g' 

